在一台单缸四气门汽油机上，用激光多普勒测速仪实验研究了涡流控制阀打开和关闭后，缸内平均速度、湍流强度和湍流结构的变化．结果表明：当涡流控制阀打开时，在压缩后期缸内流动主要是滚流的畸变和破碎过程，而当涡流控制阀关闭后，在压缩后期缸内流动主要是涡流运动．两种情况下的湍流强度和湍流结构也有较大差别． In a single-cylinder four-valve gasoline engine, the laser Doppler velocimeter was used to experimentally study the variation of the average velocity, turbulence intensity and turbulence structure in the cylinder after the vortex control valve was opened and closed. The results show that when the vortex control valve is open, the flow in the late stage of compression is mainly the distortion and breaking process of the tumble flow. When the vortex control valve is closed, the flow in the cylinder after the compression stage is mainly eddy motion. Turbulence intensity and turbulence structure are also different in both cases.